Re: Distinguish recursive Templates

[Matt Kline via Digitalmars-d-learn]

On Friday, 22 May 2015 at 21:13:50 UTC, Manfred Nowak wrote:
How can one determine the recursion depth for templated types?
Example code:

import std.stdio;
class Set(T){
  override string toString(){
    return "Set";
  }
}
void main(){
  auto s0= new Set!uint;
  writeln( s0); // writes Set

  auto s1= new Set!(Set!uint);
  writeln( s1); // should write SetSet
}

Why should the last line write SetSet? (It doesn't.) toString 
isn't making any use of the template argument T, so no recursion 
occurs.